RESEARCH INTO THE POTENTIAL OF USING SUPERCRITICAL CARBON DIOXIDE SYSTEMS IN DIESEL ENGINES OF OIL AND GAS TECHNOLOGICAL TRANSPORT
DOI:
https://doi.org/10.31471/1993-9868-2025-1(43)-150-160Keywords:
oil and gas process transport; waste heat recovery; diesel engine; supercritical carbon dioxide; sСО2; organic Rankine cycle; ORC; thermoelectric generator; fuel economy; fuel efficiency.Abstract
This article addresses the issue of enhancing the economic efficiency of power drives employed in the oil and gas industry. It proposes the use of supercritical carbon dioxide (sCO₂) cycles as a promising approach to modernising power equipment. Modern research and publications on this topic, both foreign and domestic, are analysed. Several unresolved issues related to the practical implementation of sCO₂ technology in the oil and gas industry are identified. The article therefore further investigates the potential of sCO₂ systems, organic Rankine cycle (ORC) systems and thermoelectric generator (TEG) systems for use in waste heat recovery (WHR) systems in oil and gas processing and transportation. Modelling results show that sCO₂ systems can recover the most energy from oil and gas process transport exhaust gases, followed by ORC systems. According to the calculations, the sCO₂ system recovered 19.5 kW at the maximum power point and 10.1 kW at the maximum torque point. Under the same conditions, the ORC system recovered 14.7 kW at the maximum power point and 7.9 kW at the maximum torque point. Additionally, at the low power and torque point, the sCO₂ system recovered 4.2 kW, while the ORC system recovered 3.3 kW. The TEG system produced significantly less power (533 W at maximum braking power, 126 W at maximum torque and 7 W at low power and torque) at all three points due to its low efficiency compared to the sCO₂ and ORC systems. It can therefore be concluded that the sCO₂ and ORC systems have the greatest potential impact on exhaust WHR systems. The prospects of using supercritical carbon dioxide cycles to increase the economic performance of power drives in the oil and gas industry are discussed.
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